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[tcpdump] / print-vjc.c
1 /*
2 * Copyright (c) 1990, 1991, 1993, 1994, 1995, 1996, 1997
3 * The Regents of the University of California. All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that: (1) source code distributions
7 * retain the above copyright notice and this paragraph in its entirety, (2)
8 * distributions including binary code include the above copyright notice and
9 * this paragraph in its entirety in the documentation or other materials
10 * provided with the distribution, and (3) all advertising materials mentioning
11 * features or use of this software display the following acknowledgement:
12 * ``This product includes software developed by the University of California,
13 * Lawrence Berkeley Laboratory and its contributors.'' Neither the name of
14 * the University nor the names of its contributors may be used to endorse
15 * or promote products derived from this software without specific prior
16 * written permission.
17 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
18 * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
19 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
20 */
21
22 #ifdef HAVE_CONFIG_H
23 #include "config.h"
24 #endif
25
26 #ifndef lint
27 static const char rcsid[] =
28 "@(#) $Header: /tcpdump/master/tcpdump/print-vjc.c,v 1.9 2000-10-09 01:53:21 guy Exp $ (LBL)";
29 #endif
30
31 #include <sys/param.h>
32 #include <sys/time.h>
33
34 #include <netinet/in.h>
35
36 #include <ctype.h>
37 #include <netdb.h>
38 #include <pcap.h>
39 #include <stdio.h>
40
41 #include "interface.h"
42 #include "addrtoname.h"
43
44 #include "slcompress.h"
45 #include "ppp.h"
46
47 int
48 vjc_print(register const char *bp, register u_int length, u_short proto)
49 {
50 int i;
51
52 switch (bp[0] & 0xf0) {
53 case TYPE_IP:
54 if (eflag)
55 printf("(vjc type=IP) ");
56 return PPP_IP;
57 case TYPE_UNCOMPRESSED_TCP:
58 if (eflag)
59 printf("(vjc type=raw TCP) ");
60 return PPP_IP;
61 case TYPE_COMPRESSED_TCP:
62 if (eflag)
63 printf("(vjc type=compressed TCP) ");
64 for (i = 0; i < 8; i++) {
65 if (bp[1] & (0x80 >> i))
66 printf("%c", "?CI?SAWU"[i]);
67 }
68 if (bp[1])
69 printf(" ");
70 printf("C=0x%02x ", bp[2]);
71 printf("sum=0x%04x ", *(u_short *)&bp[3]);
72 return -1;
73 case TYPE_ERROR:
74 if (eflag)
75 printf("(vjc type=error) ");
76 return -1;
77 default:
78 if (eflag)
79 printf("(vjc type=0x%02x) ", bp[0] & 0xf0);
80 return -1;
81 }
82 }